Sealey ms002 reverse action spark plug thread chaser 12mm
Sealey reverse action spark plug thread chasers sealey ms002 this reverse action thread chaser from sealey is specially designed to repair damaged spark plug threads on modern engines the unique design allows the tool to be passed through the plug thread into the combustion chamber then expanded to the correct size starting on the inner undamaged threads sealey ms002 reverse action spark plug thread chaser 12mm